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PTC has been awarded "SYSTEM AND METHOD FOR DUAL CHIRP MODULATION" in USA.

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PTC has been awarded "METHOD OF LAMP BRIGHTNESS ADJUSTING" in ROC.

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PTC has been awarded "AMPLIFIER CIRCUITS AND MODULATION SIGNAL GENERATING CIRCUITS THEREIN" in USA.

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PTC has been awarded "SOUND PLAYING SYSTEM" in USA.

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PTC has been awarded "PULSE WIDTH MODULATION SIGNAL GENERATING CIRCUIT AND AMPLIFIER CIRCUIT WITH BEAT FREQUENCY CANCELLATION CIRCUIT AUDIO PROCESSING SYSTEM" in USA.

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PTC has been awarded "AUDIO PROCESSING SYSTEM" in USA.

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PTC has been awarded "Voltage Controlling Circuit" in USA.

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PTC has been awarded "SYSTEM AND METHOD OF DUAL CHIRP MODULATION" in ROC.

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PTC has been awarded "Light Emitting Diode Driving Circuit and System" in China.

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